Commentary

As promised, Western Sierra put out news this afternoon stating the value of their recently acquired Arizona properties for accounting purposes. We are a frankly a bit shocked at how LOW they valued the proven reserves of gold and silver, but are happy to finally see a management team that seems to personify the "anti-hype" - and in the penny stock game, that gives us a nice, warm and fuzzy feeling. Sure, we like it when stocks shoot to the moon - and that usually takes a certain degree of hype - but we would MUCH rather have a company that is "acting the part" and being responsible. That tends to be an indicator that there is something behind the scenes - operationally that is - which is worth sticking around and doing the right thing for.

Anyway you cut and slice it, $08 per share in value on the books and balance sheet is a good thing....especially when the stock is trading between $.05 and $.06!!!

Press Release

July 17, 2008 1:58:00 PM

LAKE HAVASU CITY, Ariz.--(BUSINESS WIRE)--

Western Sierra Mining Corp. (OTC: WSRA) announced today that the Company has determined the valuation of the Company's recent acquisition of eight ore bearing properties in Arizona and recorded this amount on the Company's books for accounting and future reporting purposes.

Despite proven gold reserves in excess of 100,000 oz - a gross value of approximately $80 million based on a discounted spot gold price of $800/oz and 590,000 oz of proven silver reserves - a gross value of approximately $8 million based on a spot silver price of $12/oz - Western Sierra Mining Corp. has elected to record the recently finalized acquisition on the Company's books at the significantly discounted valuation amount of approximately $18 million equal to $.08 per common share on a fully diluted basis. Management has also elected not to include in the valuation nor record on the books the probable/indicated gold reserves in excess of 400,000 oz - a gross value of approximately $330 million based on a discounted spot gold price of $800/oz, nor the probable/indicated silver reserves in excess of 360,000 oz - a gross value of approximately $6 million based on a silver spot price of $12/oz. Management has furthermore applied various discounts in calculating the valuation in order to arrive at a conservative amount.

Michael Chaffee, CEO & President of Western Sierra Mining, commented, "Our CFO Dennis Atkins has worked diligently with management to value the acquired properties in what could only be characterized as an 'ultra conservative' manner. The full face-value of the proven reserves - even at below prevailing market prices - would be approximately $80 million or $.36 per share of book value for the proven gold reserves, approximately $320 million or $1.45 per share for the probable/indicated gold reserves and roughly $6 million or an additional $.03 per share for the probable/indicated silver reserves." He continued, "The recorded value of $18 million for these properties is testament to our financial conservatism. We believe it is in the best interests of all shareholders when management is committed to a set of rigorous financial controls and standards which to allow the market to value the Company properly, and we are firmly committed to holding to this standard as we continue to acquire and develop high-quality ore-bearing properties going forward."

Western Sierra Mining also released an up-to-date capital structure for the benefit of shareholders. As of Tuesday, July 15, 2008, the Company has 300,000,000 common shares authorized and 220,000,000 common shares issued and outstanding, of which approximately 21,000,000 are either freely trading or free trading eligible common shares in the DTC system.

About Western Sierra Mining Corp.

Western Sierra Mining is an aggressive gold and silver exploration and mining company focused on the historic mining districts of the Bradshaw mountains of Arizona, with additional ares of interest within Nevada and Mexico. Current projects include the SunGold, Oro Cache, and the Big Chief mining group, all of which have demonstrated high-grade mineralization with previous histories of production. Western Sierra Management's intends to continue to acquire attractive gold and silver properties in Arizona, Nevada and Mexico and to identify the character and size of our potential deposits. Long-term Company goals are to create maximum shareholder value by continuing to build a strong base of properties and advance these projects toward production or entering into joint ventures with other Junior mining companies.

Brass Bulls Investor Relations
Matthew Lovito
866-342-2700